I like light rails. Mines from 1988 & still works like new. I always use fluorescent side lighting & find by doing that I can get some pretty good yield per plant in a 4X8' grow with a 400 watt HPS. I do go heavy on the side lighting, 2 4' double tube fixtures on each side for a total of 8 T5's. Not a lot of wattage for the yield. Wont be able to do that again for a few years. Renovating house, so for now indoors will be the camper closet grow; T5's, CFL'S & maybe a few LED's. The light rail is a damned good investment. It does the work of throwing in an extra light for a LOT LESS money! ~~~ PEACE! ~~~